US2374485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the removal of organic radicals from n-substituted ureas
Assignee: Shell Development Co
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Filing: 1944-04-10
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Granted: 1945-04-24
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Expires: 1964-04-10
Abstract
No abstract record available.
Inventors
- 👤 Vernon E Haury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:58
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1854; C07C275/00; C07C275/04; C07C275/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-04-23 | 1948-10-23 | 1949-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-23 | 1952-10-23 | 1953-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-23 | 1956-10-23 | 1957-04-24 | $7700.00 | Window Closed / Lapsed |